former atf bomb investigator jim cavanaugh says it's obvious. >> large injuries were on the side of it, debris field to the left. some protected areas over on the right side that indicate the blast was to the one side of the trash receptacle. this was the scene of the blast. >> the fbi is considering publicly showing the pictures of the men they're looking for, and may do so later at a news conference today. >> pete, thank you very much. >>> drenching rain overnight in chicago. al? >> there are states of emergency throughout much of northern illinois into central illinois, because of the flooding they've gotten, the dan ryan expressway. it's a real mess there. chicago o'hare airport picking up over 4 inches of rain in the last 3 hours. in fact, airport reporting the terminal has actually had water on the floor. it's been flooding in there. still more heavy rain making its way through chicago today. it's going to continue to come down. we have flawed flood warnings much through missouri and illinois, and we're also looking for rainfall amounts anyway anyway to what they have picked up,